HackingHealthcareHealthcareData ExfiltratedCustomer Data InvolvedIdentity (basic)PIILowContained

Healthcare Services Group, Inc.

bd_fdb08db2bdb49bde · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 7, 2024

Filed

Aug 25, 2025

To disclose

46 weeks

Affected

Not disclosed

Linked

16 filings

Confidence

66%

Full breach record for Healthcare Services Group, Inc. →

Healthcare Services Group, Inc. reported unauthorized access to its computer systems between September 27 and October 3, 2024. The company discovered the incident on October 7, 2024. An unauthorized actor accessed and copied files containing personal information, including names and other data elements. HSGI secured systems, conducted an investigation, notified regulators and law enforcement, and is offering credit monitoring to affected individuals.

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Leak gap clock✗ Leak >180d46 weeks discovery → filing

Incident timeline

undetected · 10 days

discovery → filing · 46 weeks / 322 days

Sep 27, 2024

Begins

Oct 7, 2024

Discovered

Aug 25, 2025

Filed

vs. sector median

+34 wks slower

This filing is one of 16 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

New Hampshire State AGbd_2ff23a494fd0eb292025-08-25Verified
Nebraska State AGbd_3d13d9954098db8f2025-08-25Verified
Oregon State AGbd_4999f3b28468b2fa2025-08-25Verified
Washington State AGbd_4e84de9fffe373992025-08-25Verified

Show 6 more filings ↓up to 8d gap

Montana State AGbd_662a2f295d85c2662025-08-25Verified
Vermont State AGbd_82a73cadd59014cd2025-08-25Verified
Delaware State AGbd_846def17f6a32ff92025-08-25Verified
Texas State AGbd_3c672d9cc70092502025-08-26 · +1dVerified
South Carolina State AGbd_7ca401b90e6988952025-08-26 · +1dVerified
Rhode Island State AGbd_dc5f8588b13682f72025-09-02 · +8dVerified

Showing first 10 of 15 linked disclosures.

Name: Healthcare Services Group, Inc.
norm: healthcare services
Domain: hcsgcorp.com

Name: Healthcare Services Group, Inc.
norm: healthcare services
Domain: hcsgcorp.com
Industry: Healthcarellm

Discovered: Oct 7, 2024
Breach occurred: Sep 27, 2024 – Oct 3, 2024
Undetected for: 10 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)PII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified relevant state and federal regulatorsNotified federal law enforcement

During the incident: Took steps to secure our computer systems
Began an investigation to determine the nature and scope of the activity
Undertook an extensive review of the involved files
Implemented additional security measures to mitigate risk associated with this event
Notified relevant state and federal regulators
Notified federal law enforcement
Offering complimentary access to credit monitoring and identity restoration services through Experian
Changes made: Review and enhance existing policies and procedures relating to data protection and security
Implemented additional security measures to help prevent similar future incidents
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 46 weeks(322 days from discovery to filing)
Compliance flags: Leak >180d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 11 states

View merged incident ↗

New Hampshire State AGAug 25 · first

Nebraska State AGAug 25 · first

Oregon State AGAug 25 · first

Washington State AGAug 25 · first

Montana State AGAug 25 · first

Vermont State AGAug 25 · first

Delaware State AGAug 25 · first

California State AGAug 25 · first · this page

Texas State AG+1d

South Carolina State AG+1d

Rhode Island State AG+8d

Pattern: first filing Aug 25 (NH), last Sep 2 (RI) — a 8-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 15 — the full spread may be wider.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://oag.ca.gov/ecrime/databreach/reports/sb24-607688
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 25, 2025
Raw hash: e88e53923b3f82b8e30e894db5c0dab87a1264b2c2e096285412f6e2e476307f

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityHealthcare Services Group, Inc.

Victim entityHealthcare Services Group, Inc.

Incidentdiscovered Oct 7, 2024

Stated responseTook steps to secure our computer systems

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov